<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<title>FrameDecoder xref</title>
<link type="text/css" rel="stylesheet" href="../../../../../../stylesheet.css" />
</head>
<body>
<div id="overview"><a href="../../../../../../../api/org/jboss/netty/handler/codec/frame/FrameDecoder.html">View Javadoc</a></div><pre>

<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2009 Red Hat, Inc.</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * Red Hat licenses this file to you under the Apache License, version 2.0</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * (the "License"); you may not use this file except in compliance with the</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * License.  You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *    <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.codec.frame;
<a class="jxr_linenumber" name="17" href="#17">17</a>  
<a class="jxr_linenumber" name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> java.net.SocketAddress;
<a class="jxr_linenumber" name="19" href="#19">19</a>  
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffer;
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffers;
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channel;
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelHandler;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelHandlerContext;
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelPipeline;
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelStateEvent;
<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelUpstreamHandler;
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channels;
<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ExceptionEvent;
<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.MessageEvent;
<a class="jxr_linenumber" name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.SimpleChannelUpstreamHandler;
<a class="jxr_linenumber" name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.handler.codec.replay.ReplayingDecoder;
<a class="jxr_linenumber" name="33" href="#33">33</a>  
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> * Decodes the received {@link ChannelBuffer}s into a meaningful frame object.</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> * In a stream-based transport such as TCP/IP, packets can be fragmented and</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> * reassembled during transmission even in a LAN environment.  For example,</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_javadoccomment"> * let us assume you have received three packets:</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> * +-----+-----+-----+</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> * | ABC | DEF | GHI |</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> * +-----+-----+-----+</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_javadoccomment"> * because of the packet fragmentation, a server can receive them like the</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <em class="jxr_javadoccomment"> * following:</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_javadoccomment"> * +----+-------+---+---+</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_javadoccomment"> * | AB | CDEFG | H | I |</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_javadoccomment"> * +----+-------+---+---+</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>  <em class="jxr_javadoccomment"> * {@link FrameDecoder} helps you defrag the received packets into one or more</em>
<a class="jxr_linenumber" name="54" href="#54">54</a>  <em class="jxr_javadoccomment"> * meaningful &lt;strong&gt;frames&lt;/strong&gt; that could be easily understood by the</em>
<a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment"> * application logic.  In case of the example above, your {@link FrameDecoder}</em>
<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment"> * implementation could defrag the received packets like the following:</em>
<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment"> * +-----+-----+-----+</em>
<a class="jxr_linenumber" name="59" href="#59">59</a>  <em class="jxr_javadoccomment"> * | ABC | DEF | GHI |</em>
<a class="jxr_linenumber" name="60" href="#60">60</a>  <em class="jxr_javadoccomment"> * +-----+-----+-----+</em>
<a class="jxr_linenumber" name="61" href="#61">61</a>  <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="62" href="#62">62</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="63" href="#63">63</a>  <em class="jxr_javadoccomment"> * The following code shows an example handler which decodes a frame whose</em>
<a class="jxr_linenumber" name="64" href="#64">64</a>  <em class="jxr_javadoccomment"> * first 4 bytes header represents the length of the frame, excluding the</em>
<a class="jxr_linenumber" name="65" href="#65">65</a>  <em class="jxr_javadoccomment"> * header.</em>
<a class="jxr_linenumber" name="66" href="#66">66</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="67" href="#67">67</a>  <em class="jxr_javadoccomment"> * MESSAGE FORMAT</em>
<a class="jxr_linenumber" name="68" href="#68">68</a>  <em class="jxr_javadoccomment"> * ==============</em>
<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment"> * Offset:  0        4                   (Length + 4)</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>  <em class="jxr_javadoccomment"> *          +--------+------------------------+</em>
<a class="jxr_linenumber" name="72" href="#72">72</a>  <em class="jxr_javadoccomment"> * Fields:  | Length | Actual message content |</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>  <em class="jxr_javadoccomment"> *          +--------+------------------------+</em>
<a class="jxr_linenumber" name="74" href="#74">74</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="75" href="#75">75</a>  <em class="jxr_javadoccomment"> * DECODER IMPLEMENTATION</em>
<a class="jxr_linenumber" name="76" href="#76">76</a>  <em class="jxr_javadoccomment"> * ======================</em>
<a class="jxr_linenumber" name="77" href="#77">77</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="78" href="#78">78</a>  <em class="jxr_javadoccomment"> * public class IntegerHeaderFrameDecoder extends {@link FrameDecoder} {</em>
<a class="jxr_linenumber" name="79" href="#79">79</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="80" href="#80">80</a>  <em class="jxr_javadoccomment"> *   {@code @Override}</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment"> *   protected Object decode({@link ChannelHandlerContext} ctx,</em>
<a class="jxr_linenumber" name="82" href="#82">82</a>  <em class="jxr_javadoccomment"> *                           {@link Channel channel},</em>
<a class="jxr_linenumber" name="83" href="#83">83</a>  <em class="jxr_javadoccomment"> *                           {@link ChannelBuffer} buf) throws Exception {</em>
<a class="jxr_linenumber" name="84" href="#84">84</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="85" href="#85">85</a>  <em class="jxr_javadoccomment"> *     // Make sure if the length field was received.</em>
<a class="jxr_linenumber" name="86" href="#86">86</a>  <em class="jxr_javadoccomment"> *     if (buf.readableBytes() &amp;lt; 4) {</em>
<a class="jxr_linenumber" name="87" href="#87">87</a>  <em class="jxr_javadoccomment"> *        // The length field was not received yet - return null.</em>
<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment"> *        // This method will be invoked again when more packets are</em>
<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment"> *        // received and appended to the buffer.</em>
<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment"> *        return &lt;strong&gt;null&lt;/strong&gt;;</em>
<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment"> *     }</em>
<a class="jxr_linenumber" name="92" href="#92">92</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="93" href="#93">93</a>  <em class="jxr_javadoccomment"> *     // The length field is in the buffer.</em>
<a class="jxr_linenumber" name="94" href="#94">94</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="95" href="#95">95</a>  <em class="jxr_javadoccomment"> *     // Mark the current buffer position before reading the length field</em>
<a class="jxr_linenumber" name="96" href="#96">96</a>  <em class="jxr_javadoccomment"> *     // because the whole frame might not be in the buffer yet.</em>
<a class="jxr_linenumber" name="97" href="#97">97</a>  <em class="jxr_javadoccomment"> *     // We will reset the buffer position to the marked position if</em>
<a class="jxr_linenumber" name="98" href="#98">98</a>  <em class="jxr_javadoccomment"> *     // there's not enough bytes in the buffer.</em>
<a class="jxr_linenumber" name="99" href="#99">99</a>  <em class="jxr_javadoccomment"> *     buf.markReaderIndex();</em>
<a class="jxr_linenumber" name="100" href="#100">100</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="101" href="#101">101</a> <em class="jxr_javadoccomment"> *     // Read the length field.</em>
<a class="jxr_linenumber" name="102" href="#102">102</a> <em class="jxr_javadoccomment"> *     int length = buf.readInt();</em>
<a class="jxr_linenumber" name="103" href="#103">103</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="104" href="#104">104</a> <em class="jxr_javadoccomment"> *     // Make sure if there's enough bytes in the buffer.</em>
<a class="jxr_linenumber" name="105" href="#105">105</a> <em class="jxr_javadoccomment"> *     if (buf.readableBytes() &amp;lt; length) {</em>
<a class="jxr_linenumber" name="106" href="#106">106</a> <em class="jxr_javadoccomment"> *        // The whole bytes were not received yet - return null.</em>
<a class="jxr_linenumber" name="107" href="#107">107</a> <em class="jxr_javadoccomment"> *        // This method will be invoked again when more packets are</em>
<a class="jxr_linenumber" name="108" href="#108">108</a> <em class="jxr_javadoccomment"> *        // received and appended to the buffer.</em>
<a class="jxr_linenumber" name="109" href="#109">109</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="110" href="#110">110</a> <em class="jxr_javadoccomment"> *        // Reset to the marked position to read the length field again</em>
<a class="jxr_linenumber" name="111" href="#111">111</a> <em class="jxr_javadoccomment"> *        // next time.</em>
<a class="jxr_linenumber" name="112" href="#112">112</a> <em class="jxr_javadoccomment"> *        buf.resetReaderIndex();</em>
<a class="jxr_linenumber" name="113" href="#113">113</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="114" href="#114">114</a> <em class="jxr_javadoccomment"> *        return &lt;strong&gt;null&lt;/strong&gt;;</em>
<a class="jxr_linenumber" name="115" href="#115">115</a> <em class="jxr_javadoccomment"> *     }</em>
<a class="jxr_linenumber" name="116" href="#116">116</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="117" href="#117">117</a> <em class="jxr_javadoccomment"> *     // There's enough bytes in the buffer. Read it.</em>
<a class="jxr_linenumber" name="118" href="#118">118</a> <em class="jxr_javadoccomment"> *     {@link ChannelBuffer} frame = buf.readBytes(length);</em>
<a class="jxr_linenumber" name="119" href="#119">119</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="120" href="#120">120</a> <em class="jxr_javadoccomment"> *     // Successfully decoded a frame.  Return the decoded frame.</em>
<a class="jxr_linenumber" name="121" href="#121">121</a> <em class="jxr_javadoccomment"> *     return &lt;strong&gt;frame&lt;/strong&gt;;</em>
<a class="jxr_linenumber" name="122" href="#122">122</a> <em class="jxr_javadoccomment"> *   }</em>
<a class="jxr_linenumber" name="123" href="#123">123</a> <em class="jxr_javadoccomment"> * }</em>
<a class="jxr_linenumber" name="124" href="#124">124</a> <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="125" href="#125">125</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="126" href="#126">126</a> <em class="jxr_javadoccomment"> * &lt;h3&gt;Returning a POJO rather than a {@link ChannelBuffer}&lt;/h3&gt;</em>
<a class="jxr_linenumber" name="127" href="#127">127</a> <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="128" href="#128">128</a> <em class="jxr_javadoccomment"> * Please note that you can return an object of a different type than</em>
<a class="jxr_linenumber" name="129" href="#129">129</a> <em class="jxr_javadoccomment"> * {@link ChannelBuffer} in your {@code decode()} and {@code decodeLast()}</em>
<a class="jxr_linenumber" name="130" href="#130">130</a> <em class="jxr_javadoccomment"> * implementation.  For example, you could return a</em>
<a class="jxr_linenumber" name="131" href="#131">131</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/POJO" target="alexandria_uri">http://en.wikipedia.org/wiki/POJO</a>"&gt;POJO&lt;/a&gt; so that the next</em>
<a class="jxr_linenumber" name="132" href="#132">132</a> <em class="jxr_javadoccomment"> * {@link ChannelUpstreamHandler} receives a {@link MessageEvent} which</em>
<a class="jxr_linenumber" name="133" href="#133">133</a> <em class="jxr_javadoccomment"> * contains a POJO rather than a {@link ChannelBuffer}.</em>
<a class="jxr_linenumber" name="134" href="#134">134</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="135" href="#135">135</a> <em class="jxr_javadoccomment"> * &lt;h3&gt;Replacing a decoder with another decoder in a pipeline&lt;/h3&gt;</em>
<a class="jxr_linenumber" name="136" href="#136">136</a> <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="137" href="#137">137</a> <em class="jxr_javadoccomment"> * If you are going to write a protocol multiplexer, you will probably want to</em>
<a class="jxr_linenumber" name="138" href="#138">138</a> <em class="jxr_javadoccomment"> * replace a {@link FrameDecoder} (protocol detector) with another</em>
<a class="jxr_linenumber" name="139" href="#139">139</a> <em class="jxr_javadoccomment"> * {@link FrameDecoder} or {@link ReplayingDecoder} (actual protocol decoder).</em>
<a class="jxr_linenumber" name="140" href="#140">140</a> <em class="jxr_javadoccomment"> * It is not possible to achieve this simply by calling</em>
<a class="jxr_linenumber" name="141" href="#141">141</a> <em class="jxr_javadoccomment"> * {@link ChannelPipeline#replace(ChannelHandler, String, ChannelHandler)}, but</em>
<a class="jxr_linenumber" name="142" href="#142">142</a> <em class="jxr_javadoccomment"> * some additional steps are required:</em>
<a class="jxr_linenumber" name="143" href="#143">143</a> <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="144" href="#144">144</a> <em class="jxr_javadoccomment"> * public class FirstDecoder extends {@link FrameDecoder} {</em>
<a class="jxr_linenumber" name="145" href="#145">145</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="146" href="#146">146</a> <em class="jxr_javadoccomment"> *     public FirstDecoder() {</em>
<a class="jxr_linenumber" name="147" href="#147">147</a> <em class="jxr_javadoccomment"> *         super(true); // Enable unfold</em>
<a class="jxr_linenumber" name="148" href="#148">148</a> <em class="jxr_javadoccomment"> *     }</em>
<a class="jxr_linenumber" name="149" href="#149">149</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="150" href="#150">150</a> <em class="jxr_javadoccomment"> *     {@code @Override}</em>
<a class="jxr_linenumber" name="151" href="#151">151</a> <em class="jxr_javadoccomment"> *     protected Object decode({@link ChannelHandlerContext} ctx,</em>
<a class="jxr_linenumber" name="152" href="#152">152</a> <em class="jxr_javadoccomment"> *                             {@link Channel} channel,</em>
<a class="jxr_linenumber" name="153" href="#153">153</a> <em class="jxr_javadoccomment"> *                             {@link ChannelBuffer} buf) {</em>
<a class="jxr_linenumber" name="154" href="#154">154</a> <em class="jxr_javadoccomment"> *         ...</em>
<a class="jxr_linenumber" name="155" href="#155">155</a> <em class="jxr_javadoccomment"> *         // Decode the first message</em>
<a class="jxr_linenumber" name="156" href="#156">156</a> <em class="jxr_javadoccomment"> *         Object firstMessage = ...;</em>
<a class="jxr_linenumber" name="157" href="#157">157</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="158" href="#158">158</a> <em class="jxr_javadoccomment"> *         // Add the second decoder</em>
<a class="jxr_linenumber" name="159" href="#159">159</a> <em class="jxr_javadoccomment"> *         ctx.getPipeline().addLast("second", new SecondDecoder());</em>
<a class="jxr_linenumber" name="160" href="#160">160</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="161" href="#161">161</a> <em class="jxr_javadoccomment"> *         // Remove the first decoder (me)</em>
<a class="jxr_linenumber" name="162" href="#162">162</a> <em class="jxr_javadoccomment"> *         ctx.getPipeline().remove(this);</em>
<a class="jxr_linenumber" name="163" href="#163">163</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="164" href="#164">164</a> <em class="jxr_javadoccomment"> *         if (buf.readable()) {</em>
<a class="jxr_linenumber" name="165" href="#165">165</a> <em class="jxr_javadoccomment"> *             // Hand off the remaining data to the second decoder</em>
<a class="jxr_linenumber" name="166" href="#166">166</a> <em class="jxr_javadoccomment"> *             return new Object[] { firstMessage, buf.readBytes(buf.readableBytes()) };</em>
<a class="jxr_linenumber" name="167" href="#167">167</a> <em class="jxr_javadoccomment"> *         } else {</em>
<a class="jxr_linenumber" name="168" href="#168">168</a> <em class="jxr_javadoccomment"> *             // Nothing to hand off</em>
<a class="jxr_linenumber" name="169" href="#169">169</a> <em class="jxr_javadoccomment"> *             return firstMessage;</em>
<a class="jxr_linenumber" name="170" href="#170">170</a> <em class="jxr_javadoccomment"> *         }</em>
<a class="jxr_linenumber" name="171" href="#171">171</a> <em class="jxr_javadoccomment"> *     }</em>
<a class="jxr_linenumber" name="172" href="#172">172</a> <em class="jxr_javadoccomment"> * }</em>
<a class="jxr_linenumber" name="173" href="#173">173</a> <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="174" href="#174">174</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="175" href="#175">175</a> <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="http://www.jboss.org/netty/" target="alexandria_uri">http://www.jboss.org/netty/</a>"&gt;The Netty Project&lt;/a&gt;</em>
<a class="jxr_linenumber" name="176" href="#176">176</a> <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="http://gleamynode.net/" target="alexandria_uri">http://gleamynode.net/</a>"&gt;Trustin Lee&lt;/a&gt;</em>
<a class="jxr_linenumber" name="177" href="#177">177</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="178" href="#178">178</a> <em class="jxr_javadoccomment"> * @version $Rev:231 $, $Date:2008-06-12 16:44:50 +0900 (목, 12 6월 2008) $</em>
<a class="jxr_linenumber" name="179" href="#179">179</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="180" href="#180">180</a> <em class="jxr_javadoccomment"> * @apiviz.landmark</em>
<a class="jxr_linenumber" name="181" href="#181">181</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="182" href="#182">182</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/jboss/netty/handler/codec/frame/FrameDecoder.html">FrameDecoder</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../../org/jboss/netty/channel/SimpleChannelUpstreamHandler.html">SimpleChannelUpstreamHandler</a> {
<a class="jxr_linenumber" name="183" href="#183">183</a> 
<a class="jxr_linenumber" name="184" href="#184">184</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> unfold;
<a class="jxr_linenumber" name="185" href="#185">185</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> cumulation;
<a class="jxr_linenumber" name="186" href="#186">186</a> 
<a class="jxr_linenumber" name="187" href="#187">187</a>     <strong class="jxr_keyword">protected</strong> <a href="../../../../../../org/jboss/netty/handler/codec/frame/FrameDecoder.html">FrameDecoder</a>() {
<a class="jxr_linenumber" name="188" href="#188">188</a>         <strong class="jxr_keyword">this</strong>(false);
<a class="jxr_linenumber" name="189" href="#189">189</a>     }
<a class="jxr_linenumber" name="190" href="#190">190</a> 
<a class="jxr_linenumber" name="191" href="#191">191</a>     <strong class="jxr_keyword">protected</strong> <a href="../../../../../../org/jboss/netty/handler/codec/frame/FrameDecoder.html">FrameDecoder</a>(<strong class="jxr_keyword">boolean</strong> unfold) {
<a class="jxr_linenumber" name="192" href="#192">192</a>         <strong class="jxr_keyword">this</strong>.unfold = unfold;
<a class="jxr_linenumber" name="193" href="#193">193</a>     }
<a class="jxr_linenumber" name="194" href="#194">194</a> 
<a class="jxr_linenumber" name="195" href="#195">195</a>     @Override
<a class="jxr_linenumber" name="196" href="#196">196</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> messageReceived(
<a class="jxr_linenumber" name="197" href="#197">197</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/MessageEvent.html">MessageEvent</a> e) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="198" href="#198">198</a> 
<a class="jxr_linenumber" name="199" href="#199">199</a>         Object m = e.getMessage();
<a class="jxr_linenumber" name="200" href="#200">200</a>         <strong class="jxr_keyword">if</strong> (!(m instanceof ChannelBuffer)) {
<a class="jxr_linenumber" name="201" href="#201">201</a>             ctx.sendUpstream(e);
<a class="jxr_linenumber" name="202" href="#202">202</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="203" href="#203">203</a>         }
<a class="jxr_linenumber" name="204" href="#204">204</a> 
<a class="jxr_linenumber" name="205" href="#205">205</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> input = (ChannelBuffer) m;
<a class="jxr_linenumber" name="206" href="#206">206</a>         <strong class="jxr_keyword">if</strong> (!input.readable()) {
<a class="jxr_linenumber" name="207" href="#207">207</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="208" href="#208">208</a>         }
<a class="jxr_linenumber" name="209" href="#209">209</a> 
<a class="jxr_linenumber" name="210" href="#210">210</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> cumulation = cumulation(ctx);
<a class="jxr_linenumber" name="211" href="#211">211</a>         <strong class="jxr_keyword">if</strong> (cumulation.readable()) {
<a class="jxr_linenumber" name="212" href="#212">212</a>             cumulation.discardReadBytes();
<a class="jxr_linenumber" name="213" href="#213">213</a>             cumulation.writeBytes(input);
<a class="jxr_linenumber" name="214" href="#214">214</a>             callDecode(ctx, e.getChannel(), cumulation, e.getRemoteAddress());
<a class="jxr_linenumber" name="215" href="#215">215</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="216" href="#216">216</a>             callDecode(ctx, e.getChannel(), input, e.getRemoteAddress());
<a class="jxr_linenumber" name="217" href="#217">217</a>             <strong class="jxr_keyword">if</strong> (input.readable()) {
<a class="jxr_linenumber" name="218" href="#218">218</a>                 cumulation.writeBytes(input);
<a class="jxr_linenumber" name="219" href="#219">219</a>             }
<a class="jxr_linenumber" name="220" href="#220">220</a>         }
<a class="jxr_linenumber" name="221" href="#221">221</a>     }
<a class="jxr_linenumber" name="222" href="#222">222</a> 
<a class="jxr_linenumber" name="223" href="#223">223</a>     @Override
<a class="jxr_linenumber" name="224" href="#224">224</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> channelDisconnected(
<a class="jxr_linenumber" name="225" href="#225">225</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/ChannelStateEvent.html">ChannelStateEvent</a> e) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="226" href="#226">226</a>         cleanup(ctx, e);
<a class="jxr_linenumber" name="227" href="#227">227</a>     }
<a class="jxr_linenumber" name="228" href="#228">228</a> 
<a class="jxr_linenumber" name="229" href="#229">229</a>     @Override
<a class="jxr_linenumber" name="230" href="#230">230</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> channelClosed(
<a class="jxr_linenumber" name="231" href="#231">231</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/ChannelStateEvent.html">ChannelStateEvent</a> e) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="232" href="#232">232</a>         cleanup(ctx, e);
<a class="jxr_linenumber" name="233" href="#233">233</a>     }
<a class="jxr_linenumber" name="234" href="#234">234</a> 
<a class="jxr_linenumber" name="235" href="#235">235</a>     @Override
<a class="jxr_linenumber" name="236" href="#236">236</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> exceptionCaught(
<a class="jxr_linenumber" name="237" href="#237">237</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/ExceptionEvent.html">ExceptionEvent</a> e) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="238" href="#238">238</a>         ctx.sendUpstream(e);
<a class="jxr_linenumber" name="239" href="#239">239</a>     }
<a class="jxr_linenumber" name="240" href="#240">240</a> 
<a class="jxr_linenumber" name="241" href="#241">241</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="242" href="#242">242</a> <em class="jxr_javadoccomment">     * Decodes the received packets so far into a frame.</em>
<a class="jxr_linenumber" name="243" href="#243">243</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="244" href="#244">244</a> <em class="jxr_javadoccomment">     * @param ctx      the context of this handler</em>
<a class="jxr_linenumber" name="245" href="#245">245</a> <em class="jxr_javadoccomment">     * @param channel  the current channel</em>
<a class="jxr_linenumber" name="246" href="#246">246</a> <em class="jxr_javadoccomment">     * @param buffer   the cumulative buffer of received packets so far.</em>
<a class="jxr_linenumber" name="247" href="#247">247</a> <em class="jxr_javadoccomment">     *                 Note that the buffer might be empty, which means you</em>
<a class="jxr_linenumber" name="248" href="#248">248</a> <em class="jxr_javadoccomment">     *                 should not make an assumption that the buffer contains</em>
<a class="jxr_linenumber" name="249" href="#249">249</a> <em class="jxr_javadoccomment">     *                 at least one byte in your decoder implementation.</em>
<a class="jxr_linenumber" name="250" href="#250">250</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="251" href="#251">251</a> <em class="jxr_javadoccomment">     * @return the decoded frame if a full frame was received and decoded.</em>
<a class="jxr_linenumber" name="252" href="#252">252</a> <em class="jxr_javadoccomment">     *         {@code null} if there's not enough data in the buffer to decode a frame.</em>
<a class="jxr_linenumber" name="253" href="#253">253</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="254" href="#254">254</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> Object decode(
<a class="jxr_linenumber" name="255" href="#255">255</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel, <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> buffer) <strong class="jxr_keyword">throws</strong> Exception;
<a class="jxr_linenumber" name="256" href="#256">256</a> 
<a class="jxr_linenumber" name="257" href="#257">257</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="258" href="#258">258</a> <em class="jxr_javadoccomment">     * Decodes the received data so far into a frame when the channel is</em>
<a class="jxr_linenumber" name="259" href="#259">259</a> <em class="jxr_javadoccomment">     * disconnected.</em>
<a class="jxr_linenumber" name="260" href="#260">260</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="261" href="#261">261</a> <em class="jxr_javadoccomment">     * @param ctx      the context of this handler</em>
<a class="jxr_linenumber" name="262" href="#262">262</a> <em class="jxr_javadoccomment">     * @param channel  the current channel</em>
<a class="jxr_linenumber" name="263" href="#263">263</a> <em class="jxr_javadoccomment">     * @param buffer   the cumulative buffer of received packets so far.</em>
<a class="jxr_linenumber" name="264" href="#264">264</a> <em class="jxr_javadoccomment">     *                 Note that the buffer might be empty, which means you</em>
<a class="jxr_linenumber" name="265" href="#265">265</a> <em class="jxr_javadoccomment">     *                 should not make an assumption that the buffer contains</em>
<a class="jxr_linenumber" name="266" href="#266">266</a> <em class="jxr_javadoccomment">     *                 at least one byte in your decoder implementation.</em>
<a class="jxr_linenumber" name="267" href="#267">267</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="268" href="#268">268</a> <em class="jxr_javadoccomment">     * @return the decoded frame if a full frame was received and decoded.</em>
<a class="jxr_linenumber" name="269" href="#269">269</a> <em class="jxr_javadoccomment">     *         {@code null} if there's not enough data in the buffer to decode a frame.</em>
<a class="jxr_linenumber" name="270" href="#270">270</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="271" href="#271">271</a>     <strong class="jxr_keyword">protected</strong> Object decodeLast(
<a class="jxr_linenumber" name="272" href="#272">272</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel, <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> buffer) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="273" href="#273">273</a>         <strong class="jxr_keyword">return</strong> decode(ctx, channel, buffer);
<a class="jxr_linenumber" name="274" href="#274">274</a>     }
<a class="jxr_linenumber" name="275" href="#275">275</a> 
<a class="jxr_linenumber" name="276" href="#276">276</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> callDecode(
<a class="jxr_linenumber" name="277" href="#277">277</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> context, <a href="../../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel,
<a class="jxr_linenumber" name="278" href="#278">278</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> cumulation, SocketAddress remoteAddress) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="279" href="#279">279</a> 
<a class="jxr_linenumber" name="280" href="#280">280</a>         <strong class="jxr_keyword">while</strong> (cumulation.readable()) {
<a class="jxr_linenumber" name="281" href="#281">281</a>             <strong class="jxr_keyword">int</strong> oldReaderIndex = cumulation.readerIndex();
<a class="jxr_linenumber" name="282" href="#282">282</a>             Object frame = decode(context, channel, cumulation);
<a class="jxr_linenumber" name="283" href="#283">283</a>             <strong class="jxr_keyword">if</strong> (frame == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="284" href="#284">284</a>                 <strong class="jxr_keyword">if</strong> (oldReaderIndex == cumulation.readerIndex()) {
<a class="jxr_linenumber" name="285" href="#285">285</a>                     <em class="jxr_comment">// Seems like more data is required.</em>
<a class="jxr_linenumber" name="286" href="#286">286</a>                     <em class="jxr_comment">// Let us wait for the next notification.</em>
<a class="jxr_linenumber" name="287" href="#287">287</a>                     <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="288" href="#288">288</a>                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="289" href="#289">289</a>                     <em class="jxr_comment">// Previous data has been discarded.</em>
<a class="jxr_linenumber" name="290" href="#290">290</a>                     <em class="jxr_comment">// Probably it is reading on.</em>
<a class="jxr_linenumber" name="291" href="#291">291</a>                     <strong class="jxr_keyword">continue</strong>;
<a class="jxr_linenumber" name="292" href="#292">292</a>                 }
<a class="jxr_linenumber" name="293" href="#293">293</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (oldReaderIndex == cumulation.readerIndex()) {
<a class="jxr_linenumber" name="294" href="#294">294</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(
<a class="jxr_linenumber" name="295" href="#295">295</a>                         <span class="jxr_string">"decode() method must read at least one byte "</span> +
<a class="jxr_linenumber" name="296" href="#296">296</a>                         <span class="jxr_string">"if it returned a frame (caused by: "</span> + getClass() + <span class="jxr_string">")"</span>);
<a class="jxr_linenumber" name="297" href="#297">297</a>             }
<a class="jxr_linenumber" name="298" href="#298">298</a> 
<a class="jxr_linenumber" name="299" href="#299">299</a>             unfoldAndFireMessageReceived(context, remoteAddress, frame);
<a class="jxr_linenumber" name="300" href="#300">300</a>         }
<a class="jxr_linenumber" name="301" href="#301">301</a>     }
<a class="jxr_linenumber" name="302" href="#302">302</a> 
<a class="jxr_linenumber" name="303" href="#303">303</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> unfoldAndFireMessageReceived(<a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> context, SocketAddress remoteAddress, Object result) {
<a class="jxr_linenumber" name="304" href="#304">304</a>         <strong class="jxr_keyword">if</strong> (unfold) {
<a class="jxr_linenumber" name="305" href="#305">305</a>             <strong class="jxr_keyword">if</strong> (result instanceof Object[]) {
<a class="jxr_linenumber" name="306" href="#306">306</a>                 <strong class="jxr_keyword">for</strong> (Object r: (Object[]) result) {
<a class="jxr_linenumber" name="307" href="#307">307</a>                     Channels.fireMessageReceived(context, r, remoteAddress);
<a class="jxr_linenumber" name="308" href="#308">308</a>                 }
<a class="jxr_linenumber" name="309" href="#309">309</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (result instanceof Iterable&lt;?&gt;) {
<a class="jxr_linenumber" name="310" href="#310">310</a>                 <strong class="jxr_keyword">for</strong> (Object r: (Iterable&lt;?&gt;) result) {
<a class="jxr_linenumber" name="311" href="#311">311</a>                     Channels.fireMessageReceived(context, r, remoteAddress);
<a class="jxr_linenumber" name="312" href="#312">312</a>                 }
<a class="jxr_linenumber" name="313" href="#313">313</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="314" href="#314">314</a>                 Channels.fireMessageReceived(context, result, remoteAddress);
<a class="jxr_linenumber" name="315" href="#315">315</a>             }
<a class="jxr_linenumber" name="316" href="#316">316</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="317" href="#317">317</a>             Channels.fireMessageReceived(context, result, remoteAddress);
<a class="jxr_linenumber" name="318" href="#318">318</a>         }
<a class="jxr_linenumber" name="319" href="#319">319</a>     }
<a class="jxr_linenumber" name="320" href="#320">320</a> 
<a class="jxr_linenumber" name="321" href="#321">321</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> cleanup(<a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/ChannelStateEvent.html">ChannelStateEvent</a> e)
<a class="jxr_linenumber" name="322" href="#322">322</a>             <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="323" href="#323">323</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="324" href="#324">324</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> cumulation = <strong class="jxr_keyword">this</strong>.cumulation;
<a class="jxr_linenumber" name="325" href="#325">325</a>             <strong class="jxr_keyword">if</strong> (cumulation == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="326" href="#326">326</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="327" href="#327">327</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="328" href="#328">328</a>                 <strong class="jxr_keyword">this</strong>.cumulation = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="329" href="#329">329</a>             }
<a class="jxr_linenumber" name="330" href="#330">330</a> 
<a class="jxr_linenumber" name="331" href="#331">331</a>             <strong class="jxr_keyword">if</strong> (cumulation.readable()) {
<a class="jxr_linenumber" name="332" href="#332">332</a>                 <em class="jxr_comment">// Make sure all frames are read before notifying a closed channel.</em>
<a class="jxr_linenumber" name="333" href="#333">333</a>                 callDecode(ctx, ctx.getChannel(), cumulation, <strong class="jxr_keyword">null</strong>);
<a class="jxr_linenumber" name="334" href="#334">334</a>             }
<a class="jxr_linenumber" name="335" href="#335">335</a> 
<a class="jxr_linenumber" name="336" href="#336">336</a>             <em class="jxr_comment">// Call decodeLast() finally.  Please note that decodeLast() is</em>
<a class="jxr_linenumber" name="337" href="#337">337</a>             <em class="jxr_comment">// called even if there's nothing more to read from the buffer to</em>
<a class="jxr_linenumber" name="338" href="#338">338</a>             <em class="jxr_comment">// notify a user that the connection was closed explicitly.</em>
<a class="jxr_linenumber" name="339" href="#339">339</a>             Object partialFrame = decodeLast(ctx, ctx.getChannel(), cumulation);
<a class="jxr_linenumber" name="340" href="#340">340</a>             <strong class="jxr_keyword">if</strong> (partialFrame != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="341" href="#341">341</a>                 unfoldAndFireMessageReceived(ctx, <strong class="jxr_keyword">null</strong>, partialFrame);
<a class="jxr_linenumber" name="342" href="#342">342</a>             }
<a class="jxr_linenumber" name="343" href="#343">343</a>         } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="344" href="#344">344</a>             ctx.sendUpstream(e);
<a class="jxr_linenumber" name="345" href="#345">345</a>         }
<a class="jxr_linenumber" name="346" href="#346">346</a>     }
<a class="jxr_linenumber" name="347" href="#347">347</a> 
<a class="jxr_linenumber" name="348" href="#348">348</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> cumulation(<a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx) {
<a class="jxr_linenumber" name="349" href="#349">349</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> c = cumulation;
<a class="jxr_linenumber" name="350" href="#350">350</a>         <strong class="jxr_keyword">if</strong> (c == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="351" href="#351">351</a>             c = ChannelBuffers.dynamicBuffer(
<a class="jxr_linenumber" name="352" href="#352">352</a>                     ctx.getChannel().getConfig().getBufferFactory());
<a class="jxr_linenumber" name="353" href="#353">353</a>             cumulation = c;
<a class="jxr_linenumber" name="354" href="#354">354</a>         }
<a class="jxr_linenumber" name="355" href="#355">355</a>         <strong class="jxr_keyword">return</strong> c;
<a class="jxr_linenumber" name="356" href="#356">356</a>     }
<a class="jxr_linenumber" name="357" href="#357">357</a> }
</pre>
<hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body>
</html>

